MMB series mining airtight door price MMB series mining airtight door performance

Description :

　　The MMB series mining airtight door is used in the passage from the underground main substation and main drainage pump room to the underground parking lot, which is easy to close to prevent sudden water infiltration. This sealed door can withstand a pressure of 98KPa. The door leaf of this secret door is welded together with flat steel plates, cross shaped reinforcement plates, and ring beams. The door frame is a combination of channel steel and I-beam frame structure. The tensioning device is a wedge-shaped slider for clamping. The door pivot is supported by rolling bearings. A sealed door is a type of door that can increase air tightness. The materials for airtight doors include wood and steel. The key component is the sealing device.

　　The main structure of MMB series mining airtight door

　　1. The MMB series mining airtight door leaf is welded together with flat steel plates, cross shaped reinforcement plates, ring beams, and other components.

　　2. The door frame is a combination of channel steel and I-beam frame structure.

　　3. The tensioning device is a wedge-shaped slider for clamping.

　　4. The door pivot is supported by rolling bearings

　　MMB series mining airtight door working environment

　　1. Atmospheric pressure: 80kPa~110kPa;

　　2. Environmental temperature: -30 ℃ to 40 ℃;

　　3. Average relative humidity ≤ 95% (25 ℃);

　　4. Underground coal mines with explosive mixtures of methane and coal dust;

　　5. There is no gas that can corrode and damage the metal casing and electrical insulation;

　　6. Water pressure: 0-3.5MPa.

　　MMB series mining airtight door technical parameters

　　Model Example: Serial Number Model Specification

　　1 MMB1.4*1.8 1123

　　2 MMB1.6*1.8 1194

　　3 MMB1.8*2.0 1319

　　4 MMB2.1*2.0 1430

　　Precautions for MMB series mining airtight doors

　　(1) Check the concentration of harmful gases such as gas and carbon dioxide at the construction site. The construction site must have good ventilation, and the concentration of gas and carbon dioxide should not exceed the requirements of the Coal Mine Safety Regulations.

　　(2) Check the support situation of the roof and roadway walls 5m before and after the construction site, report and handle any problems in a timely manner, and only proceed with construction after there are no hidden dangers.

　　(3) The surrounding area of the wall needs to be re excavated to see the hard top and hard top, and to be firmly connected to the coal and rock; The wall surface is flat without cracks, heavy joints, or gaps. When digging, the following points should be noted:

　　(4) Cable lines need to be passed through fire doors and enclosed door walls. When building walls, hole positions should be reserved. When cables pass through, conduit pipes should be installed and arranged neatly according to the cable suspension spacing. zmjt055

　　(5) Fire doors and airtight door walls should be constructed with non combustible materials that are tightly sealed without air leakage. When using bricks to build walls, the joints should be staggered, the horizontal joints should be horizontal, and the arrangement must be neat. Prepare mortar according to a 1:3 ratio of ash to sand.

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